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Material properties of column specimens.
| Specimen | Compressive strength of concrete  (MPa) |
Longitudinal reinforcement | Transverse reinforcement | Aspect ratio |
Axial force ratio 
|
|||
|---|---|---|---|---|---|---|---|---|
 |
 |
s |  |
 |
||||
| (%) | (MPa) | (mm) | (%) | (MPa) | ||||
| UNIT1 | 26 |
1.4 (20-D16) |
400 | 55/150 | 0.93 | 400 | 4 | 0.1 |
| UNIT2 | 55/150 | 0.93 | 4 | 0.15 | ||||
| UNIT3 | 55/150 | 0.93 | 3 | 0.1 | ||||
| UNIT4 | 55/150 | 0.93 | 6 | |||||
| UNIT5 | 40/150 | 1.27 | 4 | |||||
| UNIT6 | 96/150 | 0.53 | 4 | |||||
| UNIT7 | 1.4 (10-D22) | 400 | 55/150 | 0.93 | 400 | 4 | ||
| UNIT8 | 1.4 (20-D16) | 500 | 55/150 | 0.93 | 500 | 4 | ||
